Touch display device

ABSTRACT

A touch display device can include a plurality of light-emitting elements disposed on a substrate, each light-emitting element including an emission area having a plurality of vertices. The touch display device can further include an encapsulation unit disposed on the plurality of light-emitting elements, and a plurality of touch electrodes disposed on the encapsulation unit so as to surround the emission area. Each of the plurality of touch electrodes can have a mesh structure configured to surround the emission area, and surfaces of the each of the plurality of touch electrodes facing the plurality of vertices of the emission area can be formed in a rounded shape. A distance from a peripheral edge of the emission area to a corresponding touch electrode can be substantially same in each of the plurality of light-emitting elements.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of U.S. patent application Ser. No.17/006,458, filed on Aug. 28, 2020, which claims priority to KoreanPatent Application No. 10-2019-0179486, filed on Dec. 31, 2019 in theRepublic of Korea, the entire contents of all these applications beinghereby expressly incorporated by reference into the present application.

BACKGROUND OF THE INVENTION Field of the Invention

The embodiments of the present invention relate to a touch displaydevice, and more particularly to a touch display device for preventingdeterioration in touch performance.

Discussion of the Related Art

A touch sensor is an input device through which a user can input acommand by selecting instructions displayed on a screen of a displaydevice using a hand or an object. The touch sensor converts a contactposition that directly contacts a human hand or an object into anelectrical signal and receives selected instructions based on thecontact position as an input signal. Such a touch sensor can substitutefor a separate input device that is connected to a display device andoperated, such as a keyboard or a mouse, and thus the range ofapplication of the touch sensor is continually increasing.

However, a portion of light generated in a display panel may not beradiated to the outside due to the presence of touch electrodesconstituting a touch sensor. In order to minimize this phenomenon, touchelectrodes may be formed to have a reduced line width. However, this maydeteriorate touch performance.

SUMMARY OF THE INVENTION

Accordingly, the present invention is directed to a touch display devicethat substantially obviates one or more problems due to limitations anddisadvantages of the related art.

An object of the present invention is to provide a touch display devicefor preventing deterioration in touch performance.

Additional advantages, objects, and features of the invention will beset forth in part in the description which follows and in part willbecome apparent to those having ordinary skill in the art uponexamination of the following or can be learned from practice of theinvention. The objectives and other advantages of the invention can berealized and attained by the structure particularly pointed out in thewritten description and claims hereof as well as the appended drawings.

To achieve these objects and other advantages and in accordance with thepurpose of the invention, as embodied and broadly described herein, atouch display device includes a plurality of touch electrodes, which areformed so that the surfaces thereof facing the vertices of an emissionarea of a light-emitting element are formed in a rounded shape, therebymaking the spacing distances between the touch electrodes and theemission area constant regardless of the positions thereof.

According to one aspect of the present invention, a touch display deviceincludes a light-emitting element disposed in an emission area having aplurality of vertices; an encapsulation unit disposed on thelight-emitting element; and a plurality of touch electrodes disposed onthe encapsulation unit so as to surround the emission area, theplurality of touch electrodes being formed so that surfaces thereoffacing the vertices of the emission area of the light-emitting elementare formed in a rounded shape.

According to another aspect of the present invention, a touch displaydevice includes a light-emitting element disposed in each of a pluralityof emission areas; an encapsulation unit disposed on the light-emittingelement; and a plurality of touch electrodes disposed on theencapsulation unit so as to surround the plurality of emission areas,wherein corner regions of each of the plurality of emission areas andopposing regions of each of the plurality of touch electrodes that facethe corner regions have different shapes from each other.

According to still another aspect of the present invention, a touchdisplay device includes a light-emitting element disposed in each of aplurality of subpixels comprising emission areas having different sizesfrom each other; an encapsulation unit disposed on the light-emittingelement; and a plurality of touch electrodes disposed on theencapsulation unit, wherein spacing distances between the emission areasand the plurality of touch electrodes are constant.

It is to be understood that both the foregoing general description andthe following detailed description of the present invention areexemplary and explanatory and are intended to provide furtherexplanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention and are incorporated in and constitute apart of this application, illustrate embodiment(s) of the invention andtogether with the description serve to explain the principle of theinvention. In the drawings:

FIG. 1 is a plan view showing a touch display device according to anembodiment of the present invention;

FIG. 2 is a perspective view showing the touch display device accordingto an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the touch display device taken alongline I-I′ in FIG. 2 ;

FIG. 4 is a plan view showing an example of the touch electrodes shownin FIG. 1 ;

FIG. 5 is a plan view showing a portion of the touch electrodes shown inFIG. 4 in detail;

FIG. 6 is a cross-sectional view of the touch display device taken alongline II-II′ in FIG. 5 ;

FIG. 7A is a plan view showing the region A1 shown in FIG. 1 in detail;

FIG. 7B is a plan view showing the region A2 shown in FIG. 1 in detail;and

FIG. 8 is a plan view showing another embodiment of the routing linesshown in FIG. 1 .

DETAILED DESCRIPTION OF THE EMBODIMENTS

Reference will now be made in detail to exemplary embodiments of thepresent invention, examples of which are illustrated in the accompanyingdrawings.

FIG. 1 is a plan view showing a touch display device according to anembodiment of the present invention. FIG. 2 is a perspective viewshowing the touch display device according to an embodiment of thepresent invention. FIG. 3 is a cross-sectional view of the touch displaydevice taken along line I-I′ in FIG. 2 . All the components of the touchdisplay device according to all embodiments of the present invention areoperatively coupled and configured.

The touch display device shown in FIG. 1 includes a plurality of touchelectrodes 150 (e.g., T11 to T76) and a plurality of touch lines 160connected to the respective touch electrodes 150.

Each of the touch electrodes 150 includes a capacitance formed therein,and thus is used as a self-capacitance-type touch sensor that sensesvariation in capacitance due to a user touch. In a self-capacitancesensing method using such touch electrodes 150, when a driving signalsupplied through the touch line 160 is applied to the touch electrode150, an electric charge Q accumulates in the touch sensor. At this time,when a user's finger or a conductive object touches the touch electrode150, parasitic capacitance is additionally connected to theself-capacitance sensor, and thus the capacitance value varies.Therefore, it is possible to determine the presence or absence of atouch based on the difference in capacitance values between a touchsensor that is touched by a finger and a touch sensor that is nottouched by a finger.

The touch electrodes 150, as shown in FIG. 2 , are divided from eachother in first and second directions intersecting each other, and areindependently formed on an encapsulation unit 140. Each of the touchelectrodes 150 is formed in a region corresponding to a plurality ofsubpixels in consideration of the size of an area touched by a user. Forexample, one touch electrode 150 is formed in a region that is fromseveral times to several hundred times larger than the size of onesubpixel. The plurality of subpixels comprising emission areas havingdifferent sizes from each other.

The touch electrodes 150 are formed so as to be the same size as eachother. Accordingly, variation in touch sensitivity between the touchelectrodes 150 is minimized, thus reducing noise.

The touch electrodes 150 are connected to the touch lines 160, and thusare connected to a touch-driving circuit.

The touch electrodes 150 and the touch lines 160 according to one ormore embodiments of the present invention are directly formed on adisplay panel that generates an image. Specifically, as shown in FIGS. 2and 3 , the touch display device according to the embodiments of thepresent invention includes light-emitting elements 120 arranged in amatrix form on a substrate 111, an encapsulation unit 140 disposed onthe light-emitting elements 120, and touch electrodes 150 disposed onthe encapsulation unit 140.

The substrate 111 is formed of a flexible material such as plastic orglass so as to be foldable or bendable. For example, the substrate 111is formed of polyimide (PI), polyethylene terephthalate (PET),polyethylene naphthalate (PEN), polycarbonate (PC), polyethersulfone(PES), polyacrylate (PAR), polysulfone (PSF), or cyclic-olefin copolymer(COC).

A plurality of thin-film transistors 130, included in the pixel-drivingcircuit, is disposed on the substrate 111. Each of the thin-filmtransistors 130 includes a semiconductor layer 134 disposed on amulti-buffer film 112, a gate electrode 132 overlapping thesemiconductor layer 134 with a gate insulating film 102 interposedtherebetween, and source and drain electrodes 136 and 138 formed on aninterlayer insulating film 114 so as to be in contact with thesemiconductor layer 134. Here, the semiconductor layer 134 is formed ofat least one of an amorphous semiconductor material, a polycrystallinesemiconductor material, and an oxide semiconductor material.

The light-emitting element 120 includes an anode 122, at least onelight-emitting stack 124 formed on the anode 122, and a cathode 126formed on the light-emitting stack 124.

The anode 122 is electrically connected to the drain electrode 138 ofthe thin-film transistor 130, which is exposed through a pixel contacthole 116 penetrating a protective film 108 and a pixel planarizationlayer 118.

At least one light-emitting stack 124 is formed on the anode 122 in anemission area that is defined by a bank 128. The at least onelight-emitting stack 124 is formed by stacking a hole-related layer, anorganic emission layer, and an electron-related layer on the anode 122in that order or in the reverse order. In addition, the light-emittingstack 124 can include first and second light-emitting stacks, which faceeach other with a charge generation layer interposed therebetween. Inthis case, the organic emission layer of any one of the first and secondlight-emitting stacks generates blue light, and the organic emissionlayer of the other one of the first and second light-emitting stacksgenerates yellow-green light, whereby white light is generated throughthe first and second light-emitting stacks. Since the white lightgenerated in the light-emitting stack 124 is incident on a color filterlocated above or below the light-emitting stack 124, a color image canbe realized. Alternatively, colored light corresponding to each subpixelcan be generated in each light-emitting stack 124 without a separatecolor filter in order to realize a color image. For example, thelight-emitting stack 124 of the red subpixel can generate red light, thelight-emitting stack 124 of the green subpixel can generate green light,and the light-emitting stack 124 of the blue subpixel can generate bluelight.

The cathode 126 is formed so as to face the anode 122, with thelight-emitting stack 124 interposed therebetween, and is connected to alow-voltage supply line.

The encapsulation unit 140 prevents external moisture or oxygen frompermeating the light-emitting element 120, which is vulnerable toexternal moisture or oxygen. To this end, the encapsulation unit 140includes at least one inorganic encapsulation layer 142, 146 and atleast one organic encapsulation layer 144. In the present invention, thestructure of the encapsulation unit 140, in which the first inorganicencapsulation layer 142, the organic encapsulation layer 144 and thesecond inorganic encapsulation layer 146 are stacked in that order, willbe described by way of example.

The first inorganic encapsulation layer 142 is formed on the substrate111, on which the cathode 126 has been formed. The second inorganicencapsulation layer 146 is formed on the substrate 111, on which theorganic encapsulation layer 144 has been formed, so as to cover the topsurface, the bottom surface and the side surface of the organicencapsulation layer 144 together with the first inorganic encapsulationlayer 142.

The first and second inorganic encapsulation layers 142 and 146 minimizeor prevent the permeation of external moisture or oxygen into thelight-emitting stack 124. The first and second inorganic encapsulationlayers 142 and 146 are formed of an inorganic insulating material thatis capable of being deposited at a low temperature, such as siliconnitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiON), oraluminum oxide (Al2O3). Thus, since the first and second inorganicencapsulation layers 142 and 146 are deposited in a low-temperatureatmosphere, it is possible to prevent damage to the light-emitting stack124, which is vulnerable to a high-temperature atmosphere, during theprocess of depositing the first and second inorganic encapsulationlayers 142 and 146.

The organic encapsulation layer 144 serves to dampen the stress betweenthe respective layers due to bending of the organic light-emittingdisplay device and to increase planarization performance. The organicencapsulation layer 144 is formed on the substrate 111, on which thefirst inorganic encapsulation layer 142 has been formed, using anon-photosensitive organic insulating material, such as PCL, acrylicresin, epoxy resin, polyimide, polyethylene or silicon oxycarbide(SiOC), or using a photosensitive organic insulating material such asphotoacryl. The organic encapsulation layer 144 is disposed in theactive area, rather than in the non-active area.

The mesh-type touch electrodes 150 and the touch lines 160 are disposedon the encapsulation unit 140. In order to prevent an increase in thecapacitance of the parasitic capacitor between the touch electrodes 150and the cathode 126, a touch buffer film 148, which is implemented as aninorganic or organic insulating film, can be disposed between theencapsulation unit 140 and the touch electrodes 150. In this case, thetouch lines 160 are disposed along the side surface of the touch bufferfilm 148. In a touch display device not including the touch buffer film148, the touch lines 160 are disposed along the side surface of thesecond inorganic encapsulation layer 146.

The touch electrodes 150 and the touch lines 160 are disposed in thesame plane and are formed of the same material. For example, the touchelectrodes 150 and the touch lines 160 are disposed in a single-layeredstructure without an insulating film. Accordingly, the touch electrodes150 and the touch lines 160 can be formed through a single mask process.Further, it is possible to reduce the thickness of the touch displaydevice that includes the touch electrodes 150 and the touch lines 160.

The touch electrodes 150 and the touch lines 160 are formed in asingle-layered or multi-layered structure using a touch metal layerformed of a material having high corrosion resistance and acidresistance and excellent conductivity, such as Ta, Ti, Cu, or Mo. Forexample, the touch electrodes 150 and the touch lines 160 are formed ina triple-layered structure such as a stack of Ti/Al/Ti, MoTi/Cu/MoTi, orTi/Al/Mo.

Black matrixes can be disposed on the touch electrodes 150 and the touchlines 160, and color filters can be disposed between the black matrixes.

The black matrixes prevent the touch electrodes 150 and the touch lines160 from being visible due to reflection of external light. The colorfilters prevent the cathode 126 from being visible due to reflection ofexternal light. Further, the black matrixes and the color filters can bedisposed between the touch electrodes 150 and the encapsulation unit 140in order to prevent an increase in the capacitance of the parasiticcapacitor between the touch electrodes 150 and the cathode 126.

A touch pad 170 connected to the touch lines 160 is connected to asignal transmission film on which the touch-driving circuit is mounted.

The touch pad 170 includes a lower touch pad electrode 172 and an uppertouch pad electrode 174 that is in contact with the lower touch padelectrode 172. The lower touch pad electrode 172 is disposed in the sameplane as at least one of the gate electrode 132 and the drain electrode138, and is formed of the same material. For example, the lower touchpad electrode 172 is formed of the same material as the drain electrode138, and is disposed in the same plane as the drain electrode 138, i.e.,on the interlayer insulating film 114. The upper touch pad electrode 174is disposed in the same plane as the touch electrode 150, and is formedof the same material. The upper touch pad electrode 174 is electricallyconnected to the lower touch pad electrode 172, which is exposed througha touch pad contact hole 176 that penetrates the protective film 108 andthe touch buffer film 148.

FIG. 4 is a plan view showing an example of the touch electrodes shownin FIG. 1 . FIG. 5 is a plan view showing a portion of the touchelectrodes shown in FIG. 4 in detail. FIG. 6 is a cross-sectional viewof the touch display device taken along line II-II′ in FIG. 5 .

As shown in FIG. 4 , the touch electrodes 150 of the touch displaydevice according to the embodiments of the present invention overlap thebank 128 defining the emission area EA, and have a smaller width thanthe bank 128. Each touch electrode 150 includes first to third electrodeportions 1501, 1502 and 1503. The touch electrodes 150 are formed tosurround the emission area EA.

As shown in FIGS. 5 and 6 , the first electrode portion 1501 extends inan X direction, and is disposed between the red (R) subpixel SP and thegreen (G) subpixel SP and between the blue (B) subpixels SP. The firstelectrode portion 1501 is formed to have a constant line width. Thefirst electrode portion 1501 is spaced a first distance d1 apart fromthe emission area EA, which is the top surface of the first anode 122,which is exposed by the bank 128. For example, the first electrodeportion 1501 is spaced the first distance d1 apart from the side surfaceof the bank 128, which exposes the emission area EA.

The second electrode portion 1502 extends in a Y direction intersectingthe X direction, and is disposed between the red (R) subpixel SP and theblue (B) subpixel SP and between the green (G) subpixel SP and the blue(B) subpixel SP. The second electrode portion 1502 is formed to have aconstant line width. The second electrode portion 1502 is spaced thefirst distance d1 apart from the emission area EA, which is the topsurface of the first anode 122, exposed by the bank 128. For example,the second electrode portion 1502 is spaced the first distance d1 apartfrom the side surface of the bank 128, which exposes the emission areaEA.

The third electrode portion 1503 is disposed at the intersection of thefirst and second electrode portions 1501 and 1502. The minimum linewidth of the third electrode portion 1503 is the same as the line widthof each of the first and second electrode portions 1501 and 1502, andthe maximum line width of the third electrode portion 1503 is largerthan the line width of each of the first and second electrode portions1501 and 1502. The third electrode portion 1503 is formed such that thewidth thereof gradually increases from the second electrode portion (thefirst electrode portion) to the center portion thereof. Since the entirearea of the touch electrode 150 increases due to the third electrodeportion 1503, the resistance of the touch electrode 150 can be reduced,whereby touch sensitivity can be improved.

The third electrode portion 1503, which has a larger width than each ofthe first and second electrode portions 1501 and 1502, is an opposingregion that faces a corner region of each emission area EA exposed bythe bank 128, and is formed in a different shape from the corner region.For example, the corner region of the emission area EA is formed to havea vertex, and the surface of the third electrode portion 1503 that facesthe vertex of the emission area EA is formed in a rounded shape (e.g.,concavely rounded shape). The third electrode portion 1503 has twoconcavely rounded surfaces between one blue (B) subpixel SP and one red(R)/green (G) subpixel SP. Further, the third electrode portion 1503 hasfour concavely rounded surfaces between two blue (B) subpixels SP andone red (R)/green (G) subpixel SP.

The third electrode portion 1503 is spaced a second distance d2 apartfrom the emission area EA, which is the top surface of the first anode122 exposed by the bank 128. For example, the third electrode portion1503 is spaced the second distance d2 apart from the side surface of thebank 128, which exposes the emission area EA. In this case, the seconddistance d2 is the same as or similar to the first distance d1.

The spacing distances d1 and d2 between the first to third electrodeportions 1501, 1502 and 1503 and the emission area EA exposed by thebank 128 are constant. For example, the spacing distance d1 in thevertical and horizontal directions between each of the first and secondelectrode portions 1501 and 1502 and the emission area EA is the same asor similar to the spacing distance d2 in the diagonal direction betweenthe third electrode portion 1503 and the emission area EA.

Accordingly, the lateral viewing angle θ1 in the horizontal/verticaldirection within which the emission area EA is visible without beingblocked by the touch electrode 150 is the same as the lateral viewingangle θ2 in the diagonal direction within which the emission area EA isvisible without being blocked by the touch electrode 150. Since thecolor coordinate characteristics at the lateral viewing angle in thehorizontal/vertical direction and the color coordinate characteristicsat the lateral viewing angle in the diagonal direction are similar toeach other, it is possible to eliminate the difference betweenviewpoints due to variation in the color coordinate characteristicsdepending on the viewing direction.

Table 1 shows the characteristics of a touch display device according toa comparative example and the touch display device according to theembodiment of the present invention.

In Table 1, the touch display device according to the comparativeexample is configured such that a third electrode portion of a touchelectrode is formed in a straight shape, and the touch display deviceaccording to the embodiment of the present invention is configured suchthat the third electrode portion 1503 of the touch electrode 150 isformed in a curved shape.

TABLE 1 Embodiment of the Comparative Example Present Invention ColorShift Occurrence of No Viewpoint Difference Viewpoint Difference TouchResistance High Low Touch Sensitivity Low High

In the comparative example, the spacing distance in the diagonaldirection between the third electrode portion of the touch electrode andthe emission area is longer than the spacing distance in thevertical/horizontal direction between each of the first and secondelectrode portions of the touch electrode and the emission area.Accordingly, viewpoints at which color shift occurs are formeddifferently between when viewing the screen at the viewing angle in thediagonal direction and when viewing the screen at the lateral viewingangle in the horizontal and vertical directions.

On the other hand, according to the embodiment, the spacing distance d2in the diagonal direction between the third electrode portion 1503 ofthe touch electrode and the emission area EA and the spacing distance d1in the vertical/horizontal direction between each of the first andsecond electrode portions 1501 and 1502 of the touch electrode and theemission area EA are the same as each other. Accordingly, viewpoints atwhich color shift occurs are identically formed between when viewing thescreen at the viewing angle in the diagonal direction and when viewingthe screen at the lateral viewing angle in the horizontal and verticaldirections, thereby eliminating the difference between viewpoints atwhich color shift occurs depending on the viewing direction.

Further, in the comparative example, the touch electrode is formed suchthat the third electrode portion has the same line width as each of thefirst and second electrode portions. In contrast, according to theembodiments of the present invention, the touch electrode 150 is formedsuch that the third electrode portion 1503 has a larger line width thaneach of the first and second electrode portions 1501 and 1502.Accordingly, the embodiments of the present invention are capable ofreducing touch resistance, thus improving touch sensitivity comparedwith the comparative example.

The embodiments of the present invention have been described by way ofexample as having a structure in which the third electrode portion 1503included in the touch electrodes 150 is formed in a rounded shape.However, the touch line 160 in the vertical direction disposed betweenthe touch electrodes 150 shown in FIG. 7A and the touch line 160 in thehorizontal direction disposed between the touch electrodes 150 shown inFIG. 7B can include a third line portion having a rounded shape.

Specifically, FIG. 7A is a plan view showing the region A1 shown in FIG.1 in detail, and FIG. 7B is a plan view showing the region A2 shown inFIG. 1 in detail. As shown in FIGS. 7A and 7B, the touch line 160includes first to third line portions 1601, 1602 and 1603.

The third line portion 1603 is disposed at the intersection of the firstline portion 1601, which extends in the X direction, and the second lineportion 1602, which extends in the Y direction. The third line portion1603 is an opposing region that faces each corner region of the emissionarea EA exposed by the bank 128, and is formed in a different shape fromthe corner region. For example, the corner region of the emission areaEA is formed to have a vertex, and the surface of the third line portion1603, which faces the vertex of the emission area EA, is formed in aconcavely rounded shape. Accordingly, the spacing distances between thefirst to third line portions 1601, 1602 and 1603 and the emission areaexposed by the bank 128 are constant. For example, the spacing distancein the vertical and horizontal directions between each of the first andsecond line portions 1601 and 1602 and the emission area EA is the sameas or similar to the spacing distance in the diagonal direction betweenthe third line portion 1603 and the emission area EA.

Accordingly, the lateral viewing angle in the vertical/horizontaldirection within which the emission area is visible without beingblocked by the touch line 160 is the same as the lateral viewing anglein the diagonal direction within which the emission area is visiblewithout being blocked by the touch line 160. Since the color coordinatecharacteristics at the lateral viewing angle in the vertical/horizontaldirection and the color coordinate characteristics at the lateralviewing angle in the diagonal direction are similar to each other, it ispossible to eliminate the difference between viewpoints due to variationin the color coordinate characteristics depending on the viewingdirection.

As shown in FIG. 2 , the touch lines 160 according to the embodiments ofthe present invention have been described by way of example as extendingto the touch pad 170 through the bezel area. However, as shown in FIG. 8, the touch lines 160 can extend to the touch pad 170 through thenon-emission area between the touch electrodes 150.

In addition, although a self-capacitance-type touch sensor structure hasbeen described by way of example, the embodiments of the presentinvention can also be applied to a mutual-capacitance-type touch sensorstructure.

As is apparent from the above description, according to one or moreembodiments of the present invention, the spacing distance in thediagonal direction between the touch electrode and the emission area andthe spacing distance in the vertical/horizontal direction between thetouch electrode and the emission area are the same as each other.Accordingly, when viewing the screen at the lateral viewing angle in thediagonal direction and when viewing the screen at the lateral viewingangle in the horizontal and vertical directions, viewpoints at whichcolor shift occurs are identically formed, thereby eliminating thedifference between viewpoints at which color shift occurs depending onthe viewing direction.

In addition, according to the embodiments of the present invention, thetouch electrode is formed such that a third electrode portion has alarger line width than each of first and second electrode portions,thereby reducing touch resistance by increasing the area of the touchelectrode and thus improving touch sensitivity.

It will be apparent to those skilled in the art that variousmodifications and variations can be made in the present inventionwithout departing from the spirit or scope of the invention. Thus, it isintended that the present invention covers the modifications andvariations of this invention provided they come within the scope of theappended claims and their equivalents.

What is claimed is:
 1. A touch display device comprising: a plurality oflight-emitting elements disposed on a substrate, each light-emittingelement including an emission area having a plurality of vertices; anencapsulation unit disposed on the plurality of light-emitting elements;and a plurality of touch electrodes disposed on the encapsulation unitso as to surround the emission area, wherein each of the plurality oftouch electrodes has mesh structure configured to surround the emissionarea, and surfaces of the each of the plurality of touch electrodesfacing the plurality of vertices of the emission area are formed in arounded shape, and wherein a distance from a peripheral edge of theemission area to a corresponding touch electrode is substantially samein each of the plurality of light-emitting elements.
 2. The touchdisplay device according to claim 1, wherein a spacing distance in ahorizontal direction and a vertical direction between each of theplurality of touch electrodes and the emission area is the same as aspacing distance in a diagonal direction between each of the pluralityof touch electrodes and the emission area.
 3. The touch display deviceaccording to claim 1, further comprising: a plurality of touch linesconnected to the plurality of touch electrodes and disposed along alateral surface of the encapsulation unit.
 4. The touch display deviceaccording to claim 3, wherein a spacing distance in a horizontaldirection and a vertical direction between each of the plurality oftouch lines and the emission area is the same as a spacing distance in adiagonal direction between each of the plurality of touch lines and theemission area.
 5. The touch display device according to claim 1, whereinthe plurality of touch electrodes having the mesh form expose eachemission area.
 6. The touch display device according to claim 1, whereinthe distance from the peripheral edge of the emission area to thecorresponding touch electrode is the same for all of a plurality ofsubpixels or all of the plurality of touch electrodes.
 7. A touchdisplay device comprising: a light-emitting element disposed in each ofa plurality of emission areas; an encapsulation unit disposed on thelight-emitting element; and a plurality of touch electrodes disposed onthe encapsulation unit so as to surround the plurality of emissionareas, respectively, wherein corner regions of each of the plurality ofemission areas and opposing regions of each of the plurality of touchelectrodes that face the corner regions have different shapes from eachother, and wherein a distance from a peripheral edge of each emissionarea to a corresponding touch electrode is substantially same in each ofthe plurality of light-emitting elements.
 8. The touch display deviceaccording to claim 7, wherein each of the corner regions has a vertex,and wherein each of the opposing regions is formed in a rounded shape.9. The touch display device according to claim 7, wherein a spacingdistance in a horizontal direction and a vertical direction between eachof the plurality of touch electrodes and a corresponding one of theplurality of emission areas is the same as a spacing distance in adiagonal direction between each of the plurality of touch electrodes anda corresponding one of the plurality of emission areas.
 10. The touchdisplay device according to claim 7, further comprising: a plurality oftouch lines connected to the plurality of touch electrodes and disposedalong a lateral surface of the encapsulation unit.
 11. The touch displaydevice according to claim 10, wherein a spacing distance in a horizontaldirection and a vertical direction between each of the plurality oftouch lines and the emission area is the same as a spacing distance in adiagonal direction between each of the plurality of touch lines and theemission area.
 12. The touch display device according to claim 7,wherein the plurality of touch electrodes are constituted in a mesh formthat exposes each emission area.
 13. The touch display device accordingto claim 7, wherein the distance from the peripheral edge of theemission area to the corresponding touch electrode is the same for allof a plurality of subpixels or all of the plurality of touch electrodes.14. A touch display device comprising: a plurality light-emittingelements disposed in a plurality of subpixels comprising a plurality ofemission areas, respectively, the plurality of emission areas havingdifferent sizes from each other; an encapsulation unit disposed on theplurality of light-emitting elements; and a plurality of touchelectrodes disposed on the encapsulation unit, wherein the emissionareas have a plurality of vertices, and surfaces of the plurality oftouch electrodes that face the vertices of the emission areas are formedin a rounded shape, and wherein spacing distances from the plurality ofemission areas to the plurality of touch electrodes, respectively, aresubstantially same in each of the plurality of light-emitting elements.15. The touch display device according to claim 14, wherein a spacingdistance in a horizontal direction and a vertical direction between eachof the plurality of touch electrodes and a corresponding one of theemission areas is the same as a spacing distance in a diagonal directionbetween each of the plurality of touch electrodes and a correspondingone of the emission areas.
 16. The touch display device according toclaim 14, further comprising: a plurality of touch lines connected tothe plurality of touch electrodes and disposed along a side surface ofthe encapsulation unit.
 17. The touch display device according to claim16, wherein a spacing distance in a horizontal direction and a verticaldirection between each of the plurality of touch lines and the emissionarea is the same as a spacing distance in a diagonal direction betweeneach of the plurality of touch lines and the emission area.
 18. Thetouch display device according to claim 14, wherein the plurality oftouch electrodes are constituted in a mesh form that exposes eachemission area.
 19. The touch display device according to claim 14,wherein the distance from the peripheral edge of the emission area tothe corresponding touch electrode is the same for all of the pluralityof subpixels or all of the plurality of touch electrodes.